CN106021794A - Multiresolution simulation modeling method of traffic system - Google Patents
Multiresolution simulation modeling method of traffic system Download PDFInfo
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Abstract
The invention discloses a multiresolution simulation modeling method of a traffic system. Flow data is loaded to a road segment of a road network boundary from a database, traffic flow moves according to a macroscopic traffic simulation model, a medium traffic simulation model and a microscopic traffic simulation model of corresponding resolutions, a traffic scene integrates a synchronous mode and an asynchronous mode, model consistency is maintained based on data sharing, time consistency, space consistency and information consistency of the models of different resolutions are maintained, and result consistency of the models of different resolutions in a model group is maintained. Defects of a single-granularity simulation model can be made up for, relative balance between modeling breadth and depth and between simulation precision and efficiency can be achieved by establishing a traffic multiresolution model, result consistency is well guaranteed through time consistency, space consistency and information consistency, and practicability of a multiresolution traffic model system is improved.
Description
Technical field
The invention belongs to traffic simulation field, particularly relate to a kind of traffic system multiresolution emulation modelling method.
Background technology
Through the development of decades, traffic simulation all defines the most complete a series of theory and technology in sight macroscopical, middle, three granularity aspects of microcosmic.The traffic simulation of three granularity aspects has respective advantage with not enough, and its scope of application also differs from one another.But, along with traffic programme, the development of the development of design, especially intelligent transportation system, the analysis ability of traffic simulation instrument is had higher requirement by these applications.Such as, in intelligent transportation system, in the urgent need to a set of emulation that can be competent at large-scale road network, can effectively consider again the traffic simulating system of the vehicle behavior of necessity.Along with the expansion to traffic network simulation scale and the raising to simulation Credibility requirement, single resolution modeling can not effectively solve the contradiction simulating complexity with resource-constrained.
Multi-resolution Modeling has been the study hotspot in modeling and simulation field in the world since the nineties in 20th century, current USN using multi-resolution Modeling as one of the key technology of large scale emulation；One of multi-resolution Modeling most basic challenge that to be Modern Modeling faced with emulation technology is thought by National Science research committee.Modeling method in multi-resolution Modeling is all closely related with application-specific, is difficult at short notice find out general multi-resolution Modeling strategy, is the key of multi-resolution Modeling successful implementation according to concrete Simulation Application design setting model and Simulation Strategy.
Through prior art literature retrieval is found, for multi-resolution modeling method and the not disclosed report of technology of traffic system simulation.
UNIFY method is introduced in traffic simulation by the invention " traffic system multi-resolution modeling simulation System and method for " of Patent No. CN 101727562 B, it is proposed that conformable frame UNITRANS of different grain size Traffic Flow Simulation Models.This framework can efficiently solve key issue consistency problem present in multiresolution analogue system.And choose Cell
Transmission model and Vissim, as integrating object, choose a virtual networks as modeling object, have carried out the empirical research for UNITRANS framework, tentatively illustrated feasibility and the effectiveness of UNITRANS.
But, existing scheme is not enough for the degree of depth of certain special traffic Study on Simulation Model.For multiresolution traffic simulation, multiresolution strategy and implementation method have stronger dependence with the model specifically used.Even if having employed UNITRANS framework, consistency maintenance device (Consistency Enforcer), interactive interpretation device (Interaction
Resolver) design need nonetheless remain for relating to the attribute of model self.Existing scheme has been short of.
Summary of the invention
It is an object of the invention to provide a kind of traffic system multiresolution emulation modelling method, it is intended to solving existing method can not the problem of integration realization multiresolution traffic simulation modeling.
The present invention is achieved in that a kind of traffic system multiresolution emulation modelling method includes:
When step one, analogue system bring into operation, data on flows is loaded on the section on road network border from data base, and traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model；
When step 2, synchronous mode: traffic flow is when a layers of resolution flows into another layers of resolution, and upstream entity downstream entity sends external event, downstream entities determines the order of response external event according to the situation of self；
When step 3, asynchronous mode: the model of different resolution runs, and is interacted by controller layer, carry out data interaction and unification by model layer simultaneously, carried out the display of different resolution simulation result by view layer；
The concordance of model is also safeguarded by the storage of step 4, persistent data based on data sharing, keeps the time consistency of different resolution model, Space Consistency, consistency on messaging, safeguards the result concordance between different resolution model in model race；Specifically: by the time in different model datas and positional information, eliminate or reduce the time drift between different pieces of information and position skew, obtain the consistency on messaging between different model, on the basis of time, space and consistency on messaging, the result of calculation of different models ensure that its concordance.
The external event that step 5, the flow of output, speed and density information export as downstream entity.
Further, traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model method particularly includes:
If wagon flow is in microstructure layer, move according to micro car-following model；
If wagon flow is in middle sight layer, see stream close speed relation motion according to middle；
If wagon flow is in Macro, according to macroscopic flow close speed relation motion.
Further, described traffic system multiresolution emulation modelling method sets up multiresolution traffic simulating system framework SA-MRTM based on MVC pattern, and SA-MRTM is divided into persistant data layer and MVC pattern layer two parts；
Persistent layer mainly provides the storage of data, inquires about, revises function, and the physical store of real data can be file, data base or network node；
MVC pattern layer is the logical process key-course using MVC pattern, is divided into model, view, controller three part.
Further, the model part of SA-MRTM provides the unified interface of the data for phantom, and these data are stored in spatial database, file or network node.
Further, the View component of SA-MRTM provides based on identical data model and adapts to the different function emulating purpose establishment corresponding views, and each view can be by individually-edited and storage.
Further, the controller part of SA-MRTM provides the connector function of link model and view.
Beneficial effects of the present invention is as follows:
1, the present invention can make up the deficiency of simple grain degree phantom, the shortcoming overcoming or reducing single granularity model, adapts to the actual demand of traffic simulation, the depth and broadness of balance emulation, the maximized needs meeting actual traffic Simulation Application.
2, in actual traffic Simulation Application, the present invention can realize modeling the relative equilibrium between extensiveness and intensiveness, between simulation accuracy and efficiency by setting up traffic multi-resolution models.When needing the interbehavior between careful description vehicle, can use high-precision microscopic traffic simulation, now on the left of balance deflection, simulation efficiency is relatively low；When needs describe traffic circulation state on a large scale, the macro-traffic of low precision can be used to emulate, now on the right side of balance deflection, simulation efficiency is of a relatively high；When both needing to describe traffic circulation state on a large scale, when having higher requirements simulation accuracy again, can see traffic simulation in using, now balance keeps relative balance state, simulation accuracy to obtain certain balance with efficiency.
3, existing scheme is not enough for the depth of investigation of model consistency, and the conforming feasible evaluation criterion of Definition Model of the present invention ensure that result concordance well by time consistency, Space Consistency, consistency on messaging.
4, the depth of investigation that existing scheme realizes for model system is not enough, and the present invention uses MVC pattern to devise the framework of system, improves extensibility and the reusability of system, promotes multiresolution traffic model system availability.
Accompanying drawing explanation
Fig. 1 is the traffic system multiresolution emulation modelling method flow chart that the embodiment of the present invention provides；
Fig. 2 is the detailed architecture figure of the SA-MRTM that the embodiment of the present invention provides.
Detailed description of the invention
For the summary of the invention of the present invention, feature and effect can be further appreciated that, hereby enumerate following example, and it is as follows to coordinate accompanying drawing to describe in detail.
Refer to Fig. 1 and Fig. 2:
A kind of traffic system multiresolution emulation modelling method, including:
When S101, analogue system bring into operation, data on flows is loaded on the section on road network border from data base, and traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model；
When S102, synchronous mode: traffic flow is when a layers of resolution flows into another layers of resolution, and upstream entity downstream entity sends external event, downstream entities determines the order of response external event according to the situation of self；
When S103, asynchronous mode: the model of different resolution runs, and is interacted by controller layer, carry out data interaction and unification by model layer simultaneously, carried out the display of different resolution simulation result by view layer；
The concordance of model is also safeguarded by the storage of S104, persistent data based on data sharing, keeps the time consistency of different resolution model, Space Consistency, consistency on messaging, safeguards the result concordance between different resolution model in model race；
The external event that S105, the flow of output, speed and density information export as downstream entity.
Further, traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model method particularly includes:
If wagon flow is in microstructure layer, move according to micro car-following model；
If wagon flow is in middle sight layer, see stream close speed relation motion according to middle；
If wagon flow is in Macro, according to macroscopic flow close speed relation motion.
Further, described traffic system multiresolution emulation modelling method sets up multiresolution traffic simulating system framework (System based on MVC pattern
Architecture of MRTM, SA-MRTM), SA-MRTM is divided into persistant data layer and MVC pattern layer two parts；
Persistent layer mainly provides the storage of data, inquires about, revises function, and the physical store of real data can be file, data base or network node；
MVC pattern layer is the logical process key-course using MVC pattern, is divided into model, view, controller three part.
Further, the model part of SA-MRTM provides the unified interface of the data for phantom, these data are stored in spatial database, file or network node, unified interface shields the multiformity of underlying physical data, diversity and complexity, improve data sharing and utilization rate, reduce data redundancy and maintenance cost.
Further, the View component of SA-MRTM provides based on identical data model and adapts to the different function emulating purpose establishment corresponding views, and each view can be by individually-edited and storage, without influencing each other.
Further, the controller part of SA-MRTM provides the connector function of link model and view.Receive user's request, response user operation and more new model, message processing function or call back function by a registration process the incoming event from user interface, when controller receives an event, call corresponding message and process function or call back function to perform logical process program.
Beneficial effects of the present invention is as follows:
1, the present invention can make up the deficiency of simple grain degree phantom, the shortcoming overcoming or reducing single granularity model, adapts to the actual demand of traffic simulation, the depth and broadness of balance emulation, the maximized needs meeting actual traffic Simulation Application.
2, in actual traffic Simulation Application, the present invention can realize modeling the relative equilibrium between extensiveness and intensiveness, between simulation accuracy and efficiency by setting up traffic multi-resolution models.When needing the interbehavior between careful description vehicle, can use high-precision microscopic traffic simulation, now on the left of balance deflection, simulation efficiency is relatively low；When needs describe traffic circulation state on a large scale, the macro-traffic of low precision can be used to emulate, now on the right side of balance deflection, simulation efficiency is of a relatively high；When both needing to describe traffic circulation state on a large scale, when having higher requirements simulation accuracy again, can see traffic simulation in using, now balance keeps relative balance state, simulation accuracy to obtain certain balance with efficiency.
3, existing scheme is not enough for the depth of investigation of model consistency, and the conforming feasible evaluation criterion of Definition Model of the present invention ensure that result concordance well by time consistency, Space Consistency, consistency on messaging.
4, the depth of investigation that existing scheme realizes for model system is not enough, and the present invention uses MVC pattern to devise the framework of system, improves extensibility and the reusability of system, promotes multiresolution traffic model system availability.
The above is only to presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction, every technical spirit according to the present invention, to any simple modification made for any of the above embodiments, equivalent variations and modification, belongs in the range of technical solution of the present invention.
Claims (6)
1. a traffic system multiresolution emulation modelling method, it is characterised in that described traffic system multiresolution emulation modelling method includes:
Step one, data on flows are loaded on the section on road network border from data base, and traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model；
During synchronous mode: traffic flow is when a layers of resolution flows into another layers of resolution, and upstream entity downstream entity sends external event, downstream entities determines the order of response external event according to the situation of self；
During asynchronous mode: the model of different resolution runs, and is interacted by controller layer, carry out data interaction and unification by model layer simultaneously, carried out the display of different resolution simulation result by view layer；
The concordance of model is also safeguarded by the storage of step 2, persistent data based on data sharing, keeps the time consistency of different resolution model, Space Consistency, consistency on messaging, safeguards the result concordance between different resolution model in model race；
The external event that step 3, the flow of output, speed and density information export as downstream entity.
2. traffic system multiresolution emulation modelling method as claimed in claim 1, it is characterised in that traffic flow is moved according to the macroscopic view of corresponding resolution, middle sight and Microscopic Traffic Simulation Mathematic Model method particularly includes:
Wagon flow is in microstructure layer, moves according to micro car-following model；
Wagon flow is in middle sight layer, sees stream close speed relation motion according to middle；
Wagon flow is in Macro, according to macroscopic flow close speed relation motion.
3. traffic system multiresolution emulation modelling method as claimed in claim 1, it is characterized in that, described traffic system multiresolution emulation modelling method sets up multiresolution traffic simulating system framework SA-MRTM based on MVC pattern, and SA-MRTM is divided into persistant data layer and MVC pattern layer two parts；
Persistent layer mainly provides the storage of data, inquires about, revises function, and the physical store of real data can be file, data base or network node；
MVC pattern layer is the logical process key-course using MVC pattern, is divided into model, view, controller three part.
4. traffic system multiresolution emulation modelling method as claimed in claim 3, it is characterised in that the model part of SA-MRTM provides the unified interface of the data for phantom, and these data are stored in spatial database, file or network node.
5. traffic system multiresolution emulation modelling method as claimed in claim 3, it is characterized in that, the View component of SA-MRTM provides based on identical data model and adapts to the different function emulating purpose establishment corresponding views, and each view can be by individually-edited and storage.
6. traffic system multiresolution emulation modelling method as claimed in claim 3, it is characterised in that the controller part of SA-MRTM provides the connector function of link model and view.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133099A (en) * | 2017-12-21 | 2018-06-08 | 中国电子科技集团公司第二十八研究所 | A kind of analogue system implementation method based on multi-resolution models frame |
| CN112270083A (en) * | 2020-10-23 | 2021-01-26 | 中国人民解放军海军航空大学 | Multi-resolution modeling and simulation method and system |
| CN114611337A (en) * | 2022-05-11 | 2022-06-10 | 深圳市城市交通规划设计研究中心股份有限公司 | Distributed traffic simulation method and device and storage medium |
Citations (1)
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| CN101727562A (en) * | 2009-11-05 | 2010-06-09 | 同济大学 | Multi-resolution modeling simulation system and multi-resolution modeling simulation method for traffic system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727562A (en) * | 2009-11-05 | 2010-06-09 | 同济大学 | Multi-resolution modeling simulation system and multi-resolution modeling simulation method for traffic system |
Non-Patent Citations (2)
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| 马健等: "基于多层体系结构的交通系统多分辨率仿真架构研究", 《物流科技》 * |
| 黄玮南: "交通系统多分辨率仿真研究", 《万方数据》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133099A (en) * | 2017-12-21 | 2018-06-08 | 中国电子科技集团公司第二十八研究所 | A kind of analogue system implementation method based on multi-resolution models frame |
| CN108133099B (en) * | 2017-12-21 | 2021-06-25 | 中国电子科技集团公司第二十八研究所 | Simulation system implementation method based on multi-resolution model framework |
| CN112270083A (en) * | 2020-10-23 | 2021-01-26 | 中国人民解放军海军航空大学 | Multi-resolution modeling and simulation method and system |
| CN112270083B (en) * | 2020-10-23 | 2023-03-07 | 中国人民解放军海军航空大学 | Multi-resolution modeling and simulation method and system |
| CN114611337A (en) * | 2022-05-11 | 2022-06-10 | 深圳市城市交通规划设计研究中心股份有限公司 | Distributed traffic simulation method and device and storage medium |
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